@article{EJDE_2005__2005__a198,
     author = {Cai,  Jianping},
     title = {Hopf bifurcation in the {IS-LM} business cycle model with time delay},
     journal = {Electronic journal of differential equations},
     year = {2005},
     volume = {2005},
     zbl = {1092.37057},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2005__2005__a198/}
}